The JBO Thread Ring Gauge (NoGo) - Metric Fine is a precision inspection tool crafted to verify external thread diameters. It’s designed for quality teams, engineers, machinists, and hobbyists who need reliable, fast checks on threaded components to confirm adherence to the M64 x 3 specification.

Made from hardened steel for lasting durability, this gauge is built to withstand everyday use in demanding workshops. Its right-hand, metric fine design provides consistent measurements, helping inspectors quickly identify parts that do not meet the required thread standards.

• NoGo quick-check clarity: Clearly reveals non-conforming threads at a glance, enabling fast, confident decisions during routine inspections.
• Hardened steel durability: Resists wear and maintains accuracy over many cycles in busy production environments.
• Metric Fine, 6g, right-hand compatibility: Precisely matched to standard metric thread forms, including M64 x 3, for reliable and repeatable measurements.

Using this gauge helps streamline inspection workflows, reduces rework, and supports consistent results across batches. Its robust construction and precise sizing give you confidence that threaded components will assemble correctly, every time.